Which of the Following Best Explains the Differences in the Means

Which of the following best explains the differences in the means of subsistence and lifestyles that emerged among Indian groups in the New World?

A) Different Indian groups developed diverse cultures as they adapted their means of subsistence to their needs, desires, and the environment in which they settled.
B) Native groups did not develop agriculture until after European contact in the fifteenth century.
C) The various tribes migrated to the Americas separately and came from widely divergent cultures.
D) Geographic barriers in the New world made interaction between different Indian tribes impossible.
E) None of these are correct.